title: Bis{2-[2,5-bis-(pyridin-2-yl)-1H-imidazol-4-yl]pyridinium} tetra-cyanidoplatinate(II) tetra-hydrate.
abstract: The asymmetric unit of the title hydrated complex salt, (C18H14N5)2[Pt(CN)4]·4H2O, consists of one 2-[2,5-bis-(pyridin-2-yl)-1H-imidazol-4-yl]pyridinium cation, half a tetra-cyanidoplatinate(II) dianion, which is located about a crystallographic inversion center, and two water mol-ecules of crystallization. The Pt(II) atom has a square-planar coordination environment, with Pt-CCN distances of 1.992 (4) and 2.000 (4) Å. In the cation, there is an N-H⋯N hydrogen bond linking adjacent pyridinium and pyridine rings in positions 4 and 5. Despite this, the organic component is non-planar, as shown by the dihedral angles of 10.3 (2), 6.60 (19) and 15.66 (18)° between the planes of the central imidazole ring and the pyridine/pyridinium substituents in the 2-, 4- and 5-positions. In the crystal, cations and anions are linked via O-H⋯O, O-H⋯N and N-H⋯O hydrogen bonds, forming a three-dimensional network. Additional π-π, C-H⋯O and C-H⋯N contacts provide stabilization to the crystal lattice.
authors.affiliation: Departamento de Investigación en Polimeros y Materiales, Universidad de Sonora, Rosales y Blvd. Luis Encinas S/N, Col. Centro, Edificio 3G, CP 83000, Hermosillo, Sonora, México.
authors.forename: Raquel
authors.initials: R
authors.lastname: Gámez-Heredia
authors.forename: Rosa E
authors.initials: RE
authors.lastname: Navarro
authors.forename: Herbert
authors.initials: H
authors.lastname: Höpfl
authors.forename: Adriana
authors.initials: A
authors.lastname: Cruz-Enríquez
authors.forename: José J
authors.initials: JJ
authors.lastname: Campos-Gaxiola